Lumen-hour
[loo-muh n-ouuh r, -ou-er] /ˈlu mənˌaʊər, -ˌaʊ ər/
noun, Optics.
1.
a unit of luminous energy, equal to that emitted in 1 hour by a light source emitting a luminous flux of 1 lumen.
Abbreviation: lm-hr.
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